h3{
	font-size: 18px;
}
.abc{
	width: 300px;
	height: 200px;
}
#abc{
	width: 300px;
	height: 200px;
}
body p{
	font-size: 14px;
}
body p:last-of-type{
	color: blue;
}
h3[id]{
	color: green;
}